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Sequoia <br />4 Analytical <br />404 N Wiget lane <br />Walnut Geek CA 94598 <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequotalabs com <br />Gettler Ryan Inc -Dublin Protect Chevron <br />6747 Sierra Court Suite J Project Number Chevron SS#9-5775 Reported <br />Dublin CA, 94568 Project Manager Scott Polston 25 -Apr -00 17 37 <br />_7 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX in Air (ppm) by DHS LUFT <br />Sequoia Analytical - Walnut Creels <br />Reporting <br />Analvte Result Limit units Dilution Batch Prepared Analyzed Method Motes <br />INF (WO04472-01) Air Sampled <br />19 -Apr -00 15 20 <br />Received 20 -Apr -00 I5 20 <br />Purgeable Hydrocarhons <br />3400 <br />24 ppmv l OD21004 21 -Apr OO 21 Apr -00 DHS LUFT <br />Benzene <br />940 <br />0 016 <br />Toluene <br />1000 <br />0 013 " <br />Ethylbenzene <br />84 <br />0 012 <br />Xylenes (total) <br />390 <br />0 012 " <br />EFF (WO04472-02) Air Sampled <br />19 -Apr -00 15 25 <br />Received 20 -Apr -00 15 20 <br />Purgeable Hydrocarbons <br />540 <br />2 4 ppmv l OD21004 21 -Apr -00 21 Apr 00 DHS LUFT <br />Benzene <br />130 <br />0 016 " <br />Toluene <br />250 <br />0 013 <br />Ethylbenzene <br />32 <br />0 012 " <br />Xylenes (total) <br />160 <br />0 012 <br />• <br />Sequoia Analytical - Walnut Creek The results in this report apply to the samples analysed in accordance with the chain of <br />custody document This analytical report must be reproduced in its entirety <br />9 <br />Page 4 of 10 <br />